\includegraphics[angle=90]{homer.pdf}
\includegraphics[angle=180]{homer.pdf}
\includegraphics[angle=270]{homer.pdf} \\
\includegraphics[angle=90,origin=c]{homer.pdf}
\includegraphics[angle=180,origin=c]{homer.pdf}
\includegraphics[angle=270,origin=c]{homer.pdf} \\
